AWS Cost Optimization : Load Balancer Clean Up

See below from the documentation:

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html

Idle Load Balancers

Description

Checks your Elastic Load Balancing configuration for load balancers that are idle.

Any load balancer that is configured accrues charges. If a load balancer has no associated back-end instances, or if network traffic is severely limited, the load balancer is not being used effectively. This check currently only checks for Classic Load Balancer type within ELB service. It does not include other ELB types (Application Load Balancer, Network Load Balancer).

Recommended Action

If your load balancer has no active back-end instances, consider registering instances or deleting your load balancer. See Registering Your Amazon EC2 Instances with Your Load Balancer or Delete Your Load Balancer.

If your load balancer has no healthy back-end instances, see Troubleshooting Elastic Load Balancing: Health Check Configuration.

If your load balancer has had a low request count, consider deleting your load balancer. See Delete Your Load Balancer.